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Switch driving circuit suitable for current steering DAC and control method

A technology of switch driving circuit and control method, which is applied in the direction of digital-to-analog converter, etc., which can solve the problems of large power supply voltage ripple, reduce the quality of switch control signal, and affect the performance of DAC, so as to improve the overall performance.

Pending Publication Date: 2020-10-30
苏州迅芯微电子有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a switch drive circuit suitable for a current steering DAC and a switch drive circuit suitable for a current steering DAC in view of the problem that the switch drive circuit in the prior art causes a large power supply voltage ripple due to state switching, which reduces the quality of the switch control signal and affects the performance of the DAC. The control method realizes the disturbance fixation of the power supply voltage of the switch driving circuit and breaks the correlation between noise and switching

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  • Switch driving circuit suitable for current steering DAC and control method
  • Switch driving circuit suitable for current steering DAC and control method
  • Switch driving circuit suitable for current steering DAC and control method

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them.

[0023] Based on the embodiments of the present invention, those skilled in the art can make some simple modifications and embellishments without creative work, and all other obtained embodiments also belong to the protection scope of the present invention.

[0024] Reference in the present invention to an "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one embodiment of the present invention. The presentation of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are independent or alternative embodiments mu...

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Abstract

The invention discloses a switch driving circuit suitable for a current steering DAC and a control method. The switch driving circuit comprises a first MUX circuit used for generating data and a second MUX circuit used for generating dummy data. Whether the dummy data is changed or not is determined according to whether the data is changed or not through the incidence relation between the first MUX circuit and the second MUX circuit. The control method comprises the following steps ofdriving the dummy switch driving circuit through dummy data, so that the switching of the working state of thedummy switch driving circuit is complementary with the switching of the data switch driving circuit, and the power supply voltage fluctuation of the switch driving circuit is kept consistent. The ripple profile of the power supply voltage of the switch driving circuit tends to be stable, so that the overall performance of the DAC is improved.

Description

technical field [0001] The invention belongs to the field of current rudder DAC driving, and in particular relates to a switch driving circuit and a control method suitable for the current rudder DAC. Background technique [0002] A current steering DAC consists of a collection of switched current cells. Mismatches in the switching time (steering time) between current cells will directly affect the linearity of the DAC. Under the control of the switch control signal, the switch drive circuit continuously switches states, which will generate a large dynamic current, causing the power supply voltage of the switch drive circuit to have a large ripple, which will deteriorate the quality of the switch control signal, thereby affecting the DAC. performance. [0003] Typically, signal distortion and intermodulation distortion from the last stage latch will generate supply ripple before current switching. Since the slope of the DAC switching signal is limited, the supply voltage ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66
CPCH03M1/66
Inventor 向诚单艳马梦龙邢丽沙
Owner 苏州迅芯微电子有限公司
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